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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.orchestra.conversation.jsf;
21  
22  import java.io.PrintWriter;
23  import java.io.StringWriter;
24  
25  import javax.faces.application.FacesMessage;
26  import javax.faces.context.FacesContext;
27  
28  import org.apache.myfaces.orchestra.conversation.ConversationMessager;
29  
30  /**
31   * Inform the user about some anomalies by displaying the problems as standard JSF messages.
32   * <p>
33   * This class just provides some default behaviour; if you don't like it then implement your
34   * own version of this class and configure your alternative as the standard "Conversation Messager"
35   * instead. See the documentation on interface ConversationMessager for details.
36   * <p>
37   * As required by the ConversationMessager interface, all methods on this class are thread-safe.
38   */
39  public class JsfConversationMessager extends ConversationMessager
40  {
41      public void setConversationException(Throwable t)
42      {
43          String msgSummary = t.getLocalizedMessage();
44          String msgDetail = getThrowableText(t);
45          FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_FATAL, msgSummary, msgDetail);
46          FacesContext.getCurrentInstance().addMessage(null, msg); 
47      }
48  
49      public void setConversationNotActive(String name)
50      {
51          String msgSummary = "Conversation not active";
52          String msgDetail = "Conversation not active. Please start over. (Conversation Name:" + name + ")";
53          FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_FATAL, msgSummary, msgDetail);
54          FacesContext.getCurrentInstance().addMessage(null, msg);
55      }
56  
57      protected String getThrowableText(Throwable t)
58      {
59          StringWriter sw = new StringWriter();
60          PrintWriter pw = new PrintWriter(sw);
61          t.printStackTrace(pw);
62          pw.close();
63          return sw.toString();
64      }
65  }